灰熔點硅碳管, 內徑為70mm，外徑80mm；長：500mm

硅碳管使用時要選擇合理的表面負荷密度和使用溫度。使用溫度應不大于1650攝氏度；在有害氣體環境中使用更要防止硅碳管與有害氣體發生化學反應。防止硅碳管濺(jian)上熔(rong)融(rong)金(jin)(jin)屬，濺(jian)上熔(rong)融(rong)金(jin)(jin)屬容易導致斷棒(bang)(bang)(bang)。防止堿、堿性氧化物腐蝕硅(gui)(gui)(gui)碳(tan)(tan)(tan)(tan)(tan)管(guan)(guan)(guan)(guan)(guan)。使(shi)(shi)用(yong)硅(gui)(gui)(gui)碳(tan)(tan)(tan)(tan)(tan)管(guan)(guan)(guan)(guan)(guan)必須配置調壓(ya)器(qi)或(huo)可(ke)控硅(gui)(gui)(gui)調壓(ya)器(qi)及電(dian)(dian)(dian)壓(ya)、電(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)和溫度自動控制儀表(biao)(biao)等。在使(shi)(shi)用(yong)過程(cheng)中(zhong)因(yin)棒(bang)(bang)(bang)氧化，電(dian)(dian)(dian)阻(zu)值則逐漸增加，為保(bao)持爐(lu)溫正常，應提(ti)高(gao)使(shi)(shi)用(yong)電(dian)(dian)(dian)壓(ya)，當(dang)(dang)電(dian)(dian)(dian)壓(ya)提(ti)高(gao)到(dao)所用(yong)電(dian)(dian)(dian)壓(ya)器(qi)高(gao)限(xian)度仍不(bu)(bu)能(neng)滿足要(yao)求時(shi)，可(ke)停爐(lu)改變棒(bang)(bang)(bang)的(de)接線(xian)方(fang)式(shi)在繼(ji)續(xu)使(shi)(shi)用(yong)。經常觀察(cha)電(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)、電(dian)(dian)(dian)壓(ya)表(biao)(biao)及溫度表(biao)(biao)的(de)讀數是否正常；冷端部(bu)(bu)卡(ka)具是否松動、氧化發黑或(huo)打火；硅(gui)(gui)(gui)碳(tan)(tan)(tan)(tan)(tan)管(guan)(guan)(guan)(guan)(guan)是否斷裂；硅(gui)(gui)(gui)碳(tan)(tan)(tan)(tan)(tan)管(guan)(guan)(guan)(guan)(guan)發熱(re)部(bu)(bu)紅(hong)(hong)熱(re)是否均(jun)勻(yun)。嚴(yan)禁硅(gui)(gui)(gui)碳(tan)(tan)(tan)(tan)(tan)管(guan)(guan)(guan)(guan)(guan)超負荷使(shi)(shi)用(yong)，如棒(bang)(bang)(bang)因(yin)故(gu)斷裂或(huo)發現棒(bang)(bang)(bang)發熱(re)不(bu)(bu)均(jun)，局(ju)部(bu)(bu)呈白熾或(huo)暗紅(hong)(hong)現象一段(duan)一段(duan)時(shi)，這說明(ming)棒(bang)(bang)(bang)體老(lao)化不(bu)(bu)一致，一段(duan)段(duan)電(dian)(dian)(dian)阻(zu)相差(cha)太大(da)，應停爐(lu)檢修(xiu)換(huan)(huan)棒(bang)(bang)(bang)，全部(bu)(bu)更(geng)換(huan)(huan)新棒(bang)(bang)(bang)，如更(geng)換(huan)(huan)部(bu)(bu)分新棒(bang)(bang)(bang)或(huo)單支棒(bang)(bang)(bang)時(shi)會因(yin)新棒(bang)(bang)(bang)電(dian)(dian)(dian)阻(zu)與用(yong)過棒(bang)(bang)(bang)的(de)電(dian)(dian)(dian)阻(zu)匹配不(bu)(bu)合適(shi)(shi)，導致負荷不(bu)(bu)平(ping)衡，爐(lu)溫不(bu)(bu)均(jun)勻(yun)。因(yin)電(dian)(dian)(dian)阻(zu)差(cha)異大(da)，故(gu)棒(bang)(bang)(bang)溫高(gao)低(di)相關也大(da)，會嚴(yan)重影響使(shi)(shi)用(yong)壽命。 爐(lu)子在長期運行(xing)過程(cheng)中(zhong)，個別硅(gui)(gui)(gui)碳(tan)(tan)(tan)(tan)(tan)管(guan)(guan)(guan)(guan)(guan)由于(yu)某種(zhong)原(yuan)因(yin)而損壞(huai)需(xu)要(yao)更(geng)換(huan)(huan)時(shi)，要(yao)根據當(dang)(dang)時(shi)硅(gui)(gui)(gui)碳(tan)(tan)(tan)(tan)(tan)管(guan)(guan)(guan)(guan)(guan)阻(zu)值增長情況，選補阻(zu)值適(shi)(shi)宜的(de)硅(gui)(gui)(gui)碳(tan)(tan)(tan)(tan)(tan)管(guan)(guan)(guan)(guan)(guan)，不(bu)(bu)可(ke)任意取新硅(gui)(gui)(gui)碳(tan)(tan)(tan)(tan)(tan)管(guan)(guan)(guan)(guan)(guan)更(geng)換(huan)(huan)。若硅(gui)(gui)(gui)碳(tan)(tan)(tan)(tan)(tan)管(guan)(guan)(guan)(guan)(guan)損壞(huai)較多(duo)或(huo)阻(zu)值增長過大(da)，無法達到(dao)所需(xu)爐(lu)溫時(shi)全部(bu)(bu)更(geng)換(huan)(huan)成新硅(gui)(gui)(gui)碳(tan)(tan)(tan)(tan)(tan)管(guan)(guan)(guan)(guan)(guan)。換(huan)(huan)下來的(de)硅(gui)(gui)(gui)碳(tan)(tan)(tan)(tan)(tan)管(guan)(guan)(guan)(guan)(guan)重新（用(yong)壓(ya)表(biao)(biao)，電(dian)(dian)(dian)流(liu)(liu)表(biao)(biao)）測標其電(dian)(dian)(dian)阻(zu)值，配阻(zu)用(yong)在低(di)溫區。